JP2011114928A - Inter-phase spacer for lead-in line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inter-phase spacer for a lead-in wire, which enables safe and efficient repair work. <P>SOLUTION: The inter-phase spacer 10 includes a pair of spacers 1, 1. The spacer 1 allows three lead-in wires w1-w3 formed by moderate winding to be spaced from one another, and holds a distance among the lead-in wires w1-w3. The spacer 1 has a curved surface part 12 protruding from an outer peripheral part 11 having a virtual circumference Vc formed thereon and forming a closed curved surface. The curved surface part 12 is shaped so as to have a predetermined thickness. The outer peripheral part 11 is equipped with three grooves 111-113 recessed toward substantially the center of the curved surface part 12 so that the axial centers of the three lead-in wires w1-w3 may position at apexes of a regular triangle, respectively. The pair of spacers 1, 1 are arranged with a predetermined spacing in a direction where the three lead-in wires w1-w3 extend, and thus a predetermined space for repair work can be formed in the three lead-in wires w1-w3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lead wire interphase spacer. In particular, the present invention relates to a structure of an interphase spacer for facilitating the repair work of the lead-in wire.

  An overhead distribution line or the like is provided with an interphase spacer that maintains the distance between the parallel conductors. By appropriately attaching the interphase spacer to the overhead distribution line, it is possible to prevent mixed transmission or contact of each transmission line or a plurality of lines.

  As such an interphase spacer, in a line spacer in which a plurality of wire retaining bush members are disposed on a fiber reinforced plastic rod, and a shade member for each of the three phases is disposed on the fiber reinforced plastic rod, An overhead distribution line spacer is disclosed in which the material of the retaining bush member is harder than the material of the shade member, and the material of the shade member is better elastic than the material of the wire retaining bush member (for example, a patent) Reference 1).

  The aerial distribution line spacer according to Patent Document 1 can satisfactorily perform both stable fixing of the electric wire and prevention of chipping loss of the cap member in the wire retaining bushing member.

  Moreover, as such an interphase spacer, as a spacer when laying a power cable in a phase-separated arrangement, a hollow triangular shape in which the cross-sectional shape is made of a synthetic resin such as soft PVC, polyethylene chloroprene rubber and the like is in close contact with the outer periphery of the power cable The phase separation arrangement vertical snake spacer is disclosed (for example, see Patent Document 2).

  The phase-separated arrangement vertical snake spacer according to Patent Document 2 is able to provide a phase-separated arrangement of power cable vertical snake spacers that is inexpensive and has good workability.

JP-A-8-51716 JP 9-322372 A

  The low-voltage overhead lead-in line distributes power from the trunk overhead distribution line to ordinary homes. This lead-in line may be defective due to physical damage or aging. The cause of the failure of the lead-in wire is mainly damage or disconnection due to flying objects. In the renovation work, new electric wires are replaced, but in many cases, not all electric wires are replaced, but only a part of defective lead-in wires (electric wires) is repaired.

  In the above-described renovation work, there is a method in which a lead-in line suspended from a utility pole and a support point on the house side is lowered to the ground, and the repaired lead-in line is suspended again at the point of support between the power pole and the house side. On the other hand, in the above-described repair work, there is a method of repairing a defective portion while keeping the lead-in line suspended.

  Considering “early power transmission” and “ease of work”, the latter renovation method is generally implemented in an environment where an aerial work vehicle can be used. And the renovation work using an aerial work vehicle required two workers for the reasons described below.

  In general, a low-voltage overhead lead-in wire is suspended with three wires gently twisted together. Therefore, in order to repair a part of the electric wire, one worker holds the twisted electric wires so as to be separated from each other, and the other worker repairs the defective portion.

  However, the refurbishment work with such an aerial work vehicle has the following problems. The first is that one worker needs considerable arm strength (physical strength) to separate the twisted hard wires from each other. The 2nd is that the electric wire which has a defective part becomes unstable in order to hold | maintain the twisted electric wire by human power so that it may mutually space apart.

  Thirdly, since many defective electric wires are repaired in a live line state, when an unstable state occurs, an operator is exposed to a risk of a short circuit. The fourth is that work efficiency is not good because the repair work is carried out by two people.

  In order to solve the above-mentioned problem, it is conceivable to repair the lead-in wire composed of three electric wires using an interphase spacer. However, the overhead distribution electric line spacer according to Patent Document 1 is easy to maintain the separation distance of a plurality of electric wires extending substantially in parallel, but separating the three electric wires gently twisted together is It is difficult because of its rod-like structure.

  In addition, the phase separation arrangement vertical snake spacer according to Patent Document 2 is bound with a rope or string so that the three power cables do not separate from the spacer having a hollow triangular cross section. Accordingly, it is difficult to create a required space for refurbishment by separating the three electric wires gently twisted from each other.

  If the interphase spacer that creates the required space for refurbishment can be realized by separating the three lead wires that are gently twisted from each other, hotline renovation work at high places can be carried out safely and efficiently.

  The present invention has been made in view of such a problem, the three lead wires gently twisted together are separated from each other to create a required space for repair, safety is ensured, and It is an object of the present invention to provide a lead-in interphase spacer that can be efficiently renovated.

  The present inventors configure these interphase spacers by configuring a pair of spacers having a positioning groove that diffuses so that the three lead wires gently twisted are positioned at the vertices of the equilateral triangle. The present inventors have found that the problem can be solved, and based on this, have come up with the following new interphase spacer for lead-in wires.

  (1) An interphase spacer for a lead-in wire according to the present invention includes a pair of spacers that keep three lead wires gently twisted apart from each other and maintain a distance between the lead-in wires. A curved surface portion that forms a closed curved surface that protrudes from an outer edge portion that provides a circumference, the curved surface portion is shaped to have a predetermined thickness, and the outer edge portion includes three lead wires Three groove portions that are recessed toward the approximate center of the curved surface portion are provided so that each axis center is positioned at each vertex of the equilateral triangle.

  (2) The spacer is formed of a plate-like member and has rigidity.

  (3) The spacer is made of a bendable elastic plate.

  (4) The lead-in wire interphase spacer according to the present invention further includes a telescopic rod whose both end portions can contact the central portion of the curved surface portion.

  The lead-in interphase spacer according to the present invention can create the required space for repair by separating the three lead-in wires that are gently twisted from each other, ensuring safety in aerial work vehicles And efficient renovation work is possible.

It is a perspective view which shows the structure of the interphase spacer for lead wires by one Embodiment of this invention, and is a state figure which has arrange | positioned a pair of spacer between three lead wires. It is a longitudinal cross-sectional view of the lead wire interphase spacer by the said embodiment, and is a state figure which has arrange | positioned a pair of spacer through the expansion-contraction rod between three lead wires. It is a longitudinal cross-sectional view of the lead wire interphase spacer by the said embodiment, and is a state figure which has arrange | positioned a pair of spacer between three lead wires. It is a longitudinal cross-sectional view of the lead wire interphase spacer according to the embodiment, and is a state diagram in which a pair of elastic spacers are arranged between three lead wires. It is a top view of the spacer by the 1st example of the above-mentioned embodiment. It is a top view of the spacer by the 2nd example of the above-mentioned embodiment. It is a top view of the spacer by the 3rd example of the above-mentioned embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of interphase spacer for lead-in wire]
First, the configuration of the lead-in wire interphase spacer according to one embodiment of the present invention will be described. FIG. 1 is a perspective view showing a configuration of a lead-in interphase spacer according to an embodiment of the present invention, and is a state diagram in which a pair of spacers are arranged between three lead-in wires. FIG. 2 is a longitudinal cross-sectional view of the lead-in interphase spacer according to the embodiment, and is a state diagram in which a pair of spacers is arranged between three lead-in wires via an elastic rod.

  Referring to FIGS. 1 and 2, a lead wire interphase spacer (hereinafter abbreviated as an interphase spacer) 10 according to an embodiment of the present invention includes a pair of spacers 1. In the spacer 1, three lead wires w1, w2, and w3 that are gently twisted are separated from each other. The spacer 1 maintains the distance between the lead lines w1, w2, and w3.

  The spacer 1 has a virtual circumference Vc at the outer edge portion 11 thereof. The spacer 1 has a curved surface portion 12 that protrudes from the outer edge portion 11 and forms a closed curved surface. The curved surface portion 12 is formed to have a predetermined thickness. In FIG. 1, the spacer 1 is drawn in a flat state.

  The outer edge portion 11 is provided with three groove portions 111, 112, and 113. These groove portions 111, 112, and 113 are formed so that the center of each axis of the three lead-in lines w1, w2, and w3 is located at each vertex of the equilateral triangle. The groove portions 111, 112, and 113 are recessed toward the approximate center of the curved surface portion 12.

  Referring to FIG. 1 and FIG. 2, a pair of spacers 1 and 1 are arranged on three lead-in lines w1, w2, and w3. These spacers 1 and 1 are arranged so that their outer edge portions 11 face each other. These spacers 1 and 1 are provided with a predetermined interval in the direction in which the three lead-in lines w1, w2, and w3 extend.

  Note that the three lead-in lines w1, w2, and w3 are the same, but are distinguished by changing the reference numerals for convenience of explanation. Similarly, the three grooves 111, 112, and 113 have the same shape, but are distinguished by changing the reference numerals for convenience of explanation.

  The interphase spacer 10 further includes a telescopic rod 8. The telescopic bar 8 is disposed between the pair of spacers 1. The telescopic rod 8 includes a fixed pipe 8a, a moving pipe 8b, and a grip 8c. The grip 8c is screwed to the end of the fixed pipe 8a.

  When the grip 8c is rotated in one direction, the fixed pipe 8a and the moving pipe 8b can be relatively expanded and contracted. When the grip 8c is rotated in the other direction, the fixed pipe 8a and the moving pipe 8b can be fixed.

  In FIG. 1 and FIG. 2, the interphase spacer 10 maintains the pair of spacers 1 and 1 at a predetermined interval by the end portions of the telescopic rod 8 being in contact with the center portions of the pair of curved surface portions 12 and 12, respectively. .

[Operation of interphase spacer for lead-in wire]
Next, the operation and effect of the interphase spacer 10 will be described while supplementing the configuration of the interphase spacer 10 according to the embodiment. FIG. 3 is a longitudinal sectional view of the lead-in wire interphase spacer according to the embodiment, and is a state diagram in which a pair of spacers are arranged between three lead-in wires. FIG. 4 is a longitudinal sectional view of the lead wire interphase spacer according to the embodiment, and is a state diagram in which a pair of elastic spacers are arranged between three lead wires.

  Referring to FIGS. 1 and 2, the spacer 1 according to the embodiment is directed toward the approximate center of the curved surface portion 12 such that the center of each of the three lead lines w1, w2, and w3 is located at each vertex of the equilateral triangle. Three recessed grooves 111, 112, and 113 are provided in the outer edge portion 11. Accordingly, the three lead wires w1, w2, and w3 that are gently twisted can be separated from each other so as to diffuse.

  Note that the three lead wires w1, w2, and w3 are gently twisted together has a sufficient length (distance) until the lead wires w1, w2, and w3 reach a predetermined twist angle. It means that

  The three lead-in wires w1, w2, and w3 that are gently twisted are subjected to forces that are in close contact (bundling) with each other. The three lead lines w1, w2, and w3 are blocked by the three groove portions 111, 112, and 113, and the distance between the lead lines w1, w2, and w3 can be maintained.

  In the interphase spacer 10 according to the embodiment, the pair of spacers 1 and 1 are arranged at predetermined intervals in the direction in which the three lead-in lines w1, w2, and w3 extend, whereby the three lead-in lines w1 The necessary space for renovation can be created in w2 / w3.

  Referring to FIGS. 1 and 2, the telescopic bar 8 projects pins 81 at both ends thereof. On the other hand, the spacer 1 has a hole 1a that fits into the pin 81 at the center thereof. Therefore, a pair of spacers 1 and 1 can be attached in advance to both ends of the telescopic rod 8 and incorporated between the three lead-in lines w1, w2, and w3.

  Specifically, the repair work is performed after the pair of spacers 1 and 1 are arranged between the three lead-in lines w1, w2, and w3. Most of the renovation works are for one of the three service lines w1, w2, and w3.

  For example, the renovation work is performed as follows. First, the damaged portion of the lead-in line w1 is removed. Next, the cut end of the lead-in wire w1 is crimped to a normal electric wire (core wire) with a sleeve. Then, the disconnected terminals are connected with normal electric wires. Finally, the repair work is completed by covering with an insulating tape so that the cut ends and normal wires are not exposed.

  In order to carry out the above-described repair work smoothly, the pair of spacers 1 and 1 preferably have a distance of about 80 cm. The outer diameter of the spacer 1 is preferably about 10 cm to 12 cm for carrying. The linear distance between the axial centers of the three lead-in lines w1, w2, and w3 is preferably about 8 cm in order to cover the insulating tape.

  Moreover, the spacer 1 by embodiment has the curved surface part 12 which forms the closed curved surface which protrudes from the outer edge part 11 which provides the virtual circumference Vc. Therefore, if the curved surface portion 12 is arranged on the binding side of the three lead-in lines w1, w2, and w3, rapid bending of the three lead-in lines w1, w2, and w3 can be alleviated.

  1 and 2, the interphase spacer 10 according to the embodiment uses a telescopic rod 8 to maintain a pair of spacers 1 and 1 at a predetermined distance. However, as described above, the three lead-in wires w1, w2, and w3 have a force acting so as to be in close contact with each other, so that the spacer 1 alone has three lead-in wires w1, w2, and w3. Can also be held.

  FIG. 3 shows a state in which the pair of spacers 1 and 1 are incorporated into the three lead-in lines w1, w2, and w3 without using the telescopic rod 8. In this case, the spacer 1 is bound to the three lead-in lines w1, w2, and w3 with a string-like body 9 such as a wire so that the pair of spacers 1 and 1 do not fall off from the three lead-in lines w1, w2, and w3. It is preferable to tether to. In FIG. 3, one end of the string-like body 9 is anchored to the binding side of the three lead-in lines w 1, w 2, w 3, and the other end of the string-like body 9 is anchored to the hole 1 a of the spacer 1.

  The spacer 1 shown in FIGS. 1 to 3 may be formed of a plate-like member and has rigidity. The spacer 1 is preferably an insulator, and may be formed of an insulating synthetic resin, or may be covered with an insulating material after forming a developed metal plate.

  The spacer 1 may be made of an elastic plate such as rubber that can be bent. When the disc-like spacer 1 is attached to the three lead-in lines w1, w2, and w3 as shown in FIG. Alternatively, the curved surface portion 12 may be formed by elastic deformation.

  Next, the structure of the spacer according to the first to third embodiments will be described. FIG. 5 is a plan view of the spacer according to the first example of the embodiment. FIG. 6 is a plan view of a spacer according to a second example of the embodiment. FIG. 7 is a plan view of a spacer according to a third example of the embodiment.

  The spacer 1 according to the first embodiment shown in FIG. 5 is formed in a disc shape. A part of the outer edge portion 11 of the spacer 1 shares the virtual circumference Vc. The outer edge portion 11 is provided with three groove portions 111, 112, and 113 that are recessed toward substantially the center so that the axial centers of the three lead-in lines w1, w2, and w3 are located at the vertices of the equilateral triangle. Yes. These grooves 111, 112, and 113 form a contour that is received when the spacer 1 is rotated.

  The spacer 2 according to the second embodiment shown in FIG. 6 is formed in a pseudo hexagon. Each vertex of the outer edge portion 21 of the spacer 2 is inscribed in the virtual circumference Vc. The outer edge 21 has three grooves 211, 212, and 212 that are recessed toward the center so that the axial centers of the three lead-in lines w 1, w 2, and w 3 are located at the vertices of the regular triangle. 213 is provided.

  The spacer 3 according to the third embodiment shown in FIG. 7 is formed in a pseudo triangle. Each virtual vertex of the outer edge portion 31 of the spacer 3 coincides with the virtual circumference Vc. The outer edge 31 has three grooves 311, 312, 311, 312, 311, 312, and 3, which are recessed toward the center so that the axes of the three lead lines w 1, w 2, w 3 are positioned at the vertices of the regular triangle. 313 is provided.

  If the pair of spacers 1 (including the spacers 2 and 3) according to the embodiment of the present invention are arranged on the lead-in line and the lead-in line is repaired, the following effects can be obtained. The first is that arm strength (physical strength) is not required to separate the twisted hard lead wires away from each other, so that operator fatigue is reduced. The second is that even if a defective lead-in line is repaired in a live line state, the work can be performed in a stable state, so that the worker is not exposed to the risk of a short circuit.

  Furthermore, the following effects can be obtained when the lead-in line is repaired in a live line state. The 1st is that the worker who maintains a normal lead-in line becomes unnecessary, and since the repair work is carried out by one person, work efficiency is improved.

  Second, it does not apply excessive force to the lead-in wire, and therefore does not damage the lead-in wire. Thirdly, the twisted lead wires can be held apart from each other without manual intervention, so that the repair work can be carried out in a stable state.

  Fourth, the spacer 1 (including the spacers 2 and 3) according to the embodiment of the present invention is portable and can be used in a narrow work space such as an aerial work vehicle.

1 ・ 2 ・ 3 Spacer 10 Interphase spacer (Interphase spacer for lead-in wire)
11, 21, 31 Outer edge portion 12 Curved surface portion 111-113, 211-213, 311-313 Groove Vc Virtual circumference w1, w2, w3 Lead-in line

Claims (4)

A pair of spacers are provided that keep the three lead wires gently twisted apart from each other and maintain the distance between these lead wires,
The spacer has a curved surface portion that forms a closed curved surface protruding from an outer edge portion that provides a virtual circumference,
The curved surface portion is molded to have a predetermined thickness,
The outer edge portion is provided with three groove portions that are recessed toward the approximate center of the curved surface portion so that the axial centers of the three lead-in wires are located at the vertices of an equilateral triangle. Interphase spacer.   The lead-in interphase spacer according to claim 1, wherein the spacer is formed of a plate-like member and has rigidity.   2. The lead-in interphase spacer according to claim 1, wherein the spacer comprises a bendable elastic plate.   The interphase spacer for lead-in wires according to any one of claims 1 to 3, further comprising an expansion / contraction bar whose both end portions can abut against the center portion of the curved surface portion.

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